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The Effect of Milankovitch Variations in Insolation on Equatorial Seasonality

Ashkenazy, Yosef and Eisenman, Ian and Gildor, Hezi and Tziperman, Eli (2010) The Effect of Milankovitch Variations in Insolation on Equatorial Seasonality. Journal of Climate, 23 (23). pp. 6133-6142. ISSN 0894-8755. https://resolver.caltech.edu/CaltechAUTHORS:20110131-084720321

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Abstract

Although the sun crosses the equator 2 times per year at the equinoxes, at times in the past the equatorial insolation has had only one maximum and one minimum throughout the seasonal cycle because of Milankovitch orbital variations. Here a state-of-the-art coupled atmosphere–ocean general circulation model is used to study the effect of such insolation forcing on equatorial surface properties, including air and sea temperature, salinity, winds, and currents. It is shown that the equatorial seasonality is altered according to the insolation with, for example, either maximum sea surface temperature (SST) close to the vernal equinox and minimum SST close to the autumnal equinox or vice versa. The results may have important implications for understanding tropical climate as well as for the interpretation of proxy data collected from equatorial regions.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1175/2010JCLI3700.1DOIUNSPECIFIED
http://journals.ametsoc.org/doi/abs/10.1175/2010JCLI3700.1PublisherUNSPECIFIED
ORCID:
AuthorORCID
Tziperman, Eli0000-0002-7998-5775
Additional Information:© 2010 American Meteorological Society. Received: March 1, 2010; Accepted: July 26, 2010. We thank the United States–Israel Binational Science Foundation for its financial support. Author IE is funded by a Prize Postdoctoral Fellowship through Caltech’s Division of Geological and Planetary Sciences and a NOAA Climate and Global Change Postdoctoral Fellowship administered by the University Corporation for Atmospheric Research; ET is funded by the NSF P2C2 program through Grant ATM-0902844.
Funders:
Funding AgencyGrant Number
United States–Israel Binational Science Foundation (BSF)UNSPECIFIED
Caltech Division of Geological and Planetary Sciences Prize Postdoctoral FellowshipUNSPECIFIED
NOAA Climate and Global Change Postdoctoral FellowshipUNSPECIFIED
NSF P2C2ATM-0902844
Subject Keywords:Seasonal cycle, Solar cycle, Paleoclimate, Climate variability, General circulation models
Issue or Number:23
Record Number:CaltechAUTHORS:20110131-084720321
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20110131-084720321
Official Citation:Ashkenazy, Yosef, Ian Eisenman, Hezi Gildor, Eli Tziperman, 2010: The Effect of Milankovitch Variations in Insolation on Equatorial Seasonality. J. Climate, 23, 6133–6142. doi: 10.1175/2010JCLI3700.1
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21928
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:31 Jan 2011 23:18
Last Modified:09 Mar 2020 13:19

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